Two residents lie savagely mutilated in their coastal home, injuries resembling an animal attack. In the backyard: a decomposed elderly corpse, weeks dead, yet somehow central to this fresh massacre. When identified as Meg Garland's vanished father, the scientist is pulled into an investigation defying logic. Autopsy results reveal impossibilities. Her father's terror-filled disappearance wasn't abandonment. Something unspeakable drove him away. Now that same presence circles closer, and Meg must face a parent's horrifying sacrifice against insidious evil.